v3.26.1
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Mar. 12, 2026
Jun. 30, 2025
Document and Entity Information        
Document Type 10-K      
Document Annual Report true      
Document Period End Date Dec. 31, 2025      
Document Transition Report false      
Securities Act File Number 001-37661      
Entity Registrant Name SMARTFINANCIAL INC.      
Entity Incorporation, State or Country Code TN      
Entity Tax Identification Number 62-1173944      
Entity Address, Address Line One 5401 Kingston Pike, Suite 600      
Entity Address, City or Town Knoxville      
Entity Address, State or Province TN      
Entity Address, Postal Zip Code 37919      
City Area Code 865      
Local Phone Number 437-5700      
Title of 12(b) Security Common Stock, par value $1.00 per share      
Trading Symbol SMBK      
Security Exchange Name NYSE      
Entity Well-known Seasoned Issuer No      
Entity Voluntary Filers No      
Entity Current Reporting Status Yes      
Entity Interactive Data Current Yes      
Entity Filer Category Accelerated Filer      
Entity Small Business false      
Entity Emerging Growth Company false      
ICFR Auditor Attestation Flag true      
Document Financial Statement Error Correction [Flag] false      
Entity Shell Company false      
Entity Public Float       $ 535.9
Entity Common Stock, Shares Outstanding     17,096,969  
Documents Incorporated by Reference

Portions of the registrant’s Proxy Statement for the Annual Meeting of Shareholders to be held on May 21, 2026, are incorporated by reference in Part III of this Form 10-K.

      
Entity Central Index Key 0001038773      
Current Fiscal Year End Date --12-31      
Amendment Flag false      
Document Fiscal Year Focus 2025      
Document Fiscal Period Focus FY      
Auditor Name Elliott Davis, PLLC Forvis Mazars, LLP    
Auditor Firm ID 149 686    
Auditor Location Raleigh, North Carolina Louisville, Kentucky